Does any corporate event that affects the stock price/shares outstanding happen during the trading session in vanilla US Common stocks or predominantly at night ?


1 Answer 1


All the events that affect shares outstanding happen overnight.

  • $\begingroup$ I would assume same for price ? $\endgroup$
    – Kreol
    Jul 25, 2020 at 2:52
  • $\begingroup$ Right, everything like splits/reverse splits happen overnight. $\endgroup$
    – LazyCat
    Jul 25, 2020 at 16:05
  • $\begingroup$ Not true: some events which affect price can happen intraday. For example: spin-off and merger announcements can occur during the trading day. $\endgroup$
    – kurtosis
    Jul 26, 2020 at 21:11
  • 1
    $\begingroup$ @kurtosis The announcement may happen intraday, but the actual event will happen overnight. $\endgroup$
    – LazyCat
    Jul 26, 2020 at 22:39
  • $\begingroup$ @LazyCat: OP asked about effects on price. Prices will respond immediately or, if the stock is halted, as soon as the re-opening auction is held for that stock. $\endgroup$
    – kurtosis
    Jul 26, 2020 at 23:35

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